A method and device for detecting a faulty battery
A technology for detecting faults and batteries, applied in measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as high cost, susceptibility to interference, and poor safety of high-current discharge, and achieve low consumption cost and strong anti-interference ability , to achieve a simple and convenient effect
Active Publication Date: 2011-12-07
四川德源电气有限公司
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Problems solved by technology
[0010] Among the various methods mentioned above: the DC discharge method has defects such as high cost, large discharge resistance and wires, difficult installation and maintenance, poor safety of high-current discharge, and damage to battery health; the AC impedance method has high cost, is susceptible to interference, and cannot be quickly detected. Defects such as faulty batteries; modern switching power supplies have high-frequency harmonic voltages and currents when they work, and cannot meet the conditions of constant current discharge. The platform voltage method of the discharge transient process is difficult to apply to switching power supplies
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[0051] The embodiment of the present application provides a method and device for detecting a faulty battery. A method and device are provided. When the battery pack discharges the working load, the DC voltage of each battery in the battery pack is only tested during the transient discharge process. , Ripple voltage for passive detection, you can quickly detect the faulty battery in the battery pack.
[0052] The above is the core idea of the present application, in order to enable those skilled in the art to better understand the solution of the present application. The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without...
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The invention discloses a method for detecting a faulty battery, which comprises the following steps of: sampling voltages of all battery monomers with a time stamp in a variable period in a discharge transient state process of a battery pack; adjusting a starting point and a unit of a sampling value of the sampled voltages of all the battery monomers; establishing a voltage curve of all the battery monomers according to the adjusted sampling value so as to acquire a characteristic value of all the battery monomers for characterizing the shape of the voltage curve, and calculating an average value of characteristic values of all battery monomer curves and an average value of all battery voltages; and comparing data values of all the battery monomers with the calculated average data values, and determining the faulty battery according to a comparison result. The embodiment of the invention provides a method and a device for rapidly detecting the faulty battery in the discharge transient state process; and when a storage battery pack normally discharges a working load, the direct current voltage and the ripple voltage of each battery in the battery pack are passively detected in the discharge transient state process only, namely the faulty battery in the battery pack can be rapidly detected.
Description
technical field [0001] The present application relates to the field of batteries, in particular to a method and device for quickly detecting a faulty battery by utilizing a discharge transient process. Background technique [0002] The voltage of the battery unit (referred to as Cell) cannot meet the requirements of most applications. Generally, several battery cells are connected in series and then packaged into a higher voltage battery cell (referred to as Block), and then several battery cells are connected in series with wires to form a block. The battery pack (referred to as Bank) is for users to use. [0003] Due to battery manufacturing deviations and different use conditions, the characteristic deviation of each block in the battery pack will gradually increase with the use time, resulting in a gradual increase in the capacity deviation, which will affect the overall capacity and life of the bank. [0004] The faulty battery detection device is used to find the Bloc...
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Inventor 陈健
Owner 四川德源电气有限公司